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Buku sjrh = y
4x+5y = 270 |x6| 24x + 30y= 1.620
6x+2y = 230 |x4| 24x + 8y = 920
22y = 700
y = 700/22
y=38,18
4x+5(38,18) = 270
4x+190,9=270
4x = 190,9+270
4x = 460,9
x= 460,9/4
x= 115,225
Ditanya 1y = 38,18
5x = 5x 115,225
= 576,125